2.4L LE5 Performance Tech 16 valve 171 hp EcoTec with 163 lb-ft of torque

2.4L Supercharged build started

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Old 09-22-2007, 08:41 PM
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yea man, me too
Old 09-22-2007, 08:59 PM
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is it hard to install gauges????...i got a autometer/a/f ratio...and im gonna get a boost gauge and a wideband....or does it cause alot to get it installed?
Old 09-22-2007, 10:11 PM
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Originally Posted by pjk91
The long bolt that is used to bolt up the IM is definitely the wrong size in the instructions.

The barb that is on the throttle body is supposed to be piped into the intake tube. However, we are working on a different solution to this while still being able to pass emissions.

The LC-1 is acting funny. It seems like there is a delay, and the gauge is reading almost no difference in afr. Still working on that...
which manifold bolt are you speaking of? will the stock bolts from the Intake manifold work for the lsj manifold? i picked up the studs from the dealership
Old 09-22-2007, 11:05 PM
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the LSJ bolts are thicker than the ones that will fit in the LE5 block. You need to get a narrower bolt. The 90mm bolts in the instructions are too long. We had to cut them about 30mm, but I'll see if I can find out if he measured them after he cut or not.

The short ones are fine, I believe they were 25mm grade 6 bolts. I know I have those measurements written down.
Old 09-22-2007, 11:35 PM
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90mm I believe were new studs that you have to use which are 6M

As for the alternator, with the new setup it will spin CCW. Not sure if the stock one will work spining backwards but you guys can test it.
Old 09-23-2007, 01:17 PM
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Originally Posted by pjk91
the LSJ bolts are thicker than the ones that will fit in the LE5 block. You need to get a narrower bolt. The 90mm bolts in the instructions are too long. We had to cut them about 30mm, but I'll see if I can find out if he measured them after he cut or not.

The short ones are fine, I believe they were 25mm grade 6 bolts. I know I have those measurements written down.
interesting. i removed one of the stock intake manifold bolts and it was much longer than the 25mm 6m bolts. It seemed like the 25mm 6m would be too short. did you try reusing the stock bolts for the manifold? also how did it go with the alternator. update us
Old 09-23-2007, 01:32 PM
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We still aren't sure about the alternator. It looks like we are going to dump the idea of using the 2-bar map sensor and go with the stock LSJ map sensor. Also are going to order the stock LSJ upper radiator hose. The chrome thing is a POS to put it lightly. I want this to be reliable and not just rigged up "so it works". If that means waiting an extra day or two for parts then that's what I will do. Also getting the IAT sensor on the S/C.

Some other issues came up, but Fred @ SMG can better explain than I can since he is doing the work. He did mention that it would extremely nice to have an LSJ throttle body rather than the LE5 throttle body. But either one would work. LSJ is better.

Originally Posted by Beck
stock bolts for the manifold? also how did it go with the alternator. update us

Stock bolts won't work. If you ordered the correct stainless steel ones in the instructions you shouldbe all set. Just torque them correctly in the right order and you will be ok.

Last edited by pjk91; 09-23-2007 at 01:32 PM. Reason: Automerged Doublepost
Old 09-23-2007, 01:45 PM
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Originally Posted by pjk91
We still aren't sure about the alternator. It looks like we are going to dump the idea of using the 2-bar map sensor and go with the stock LSJ map sensor. Also are going to order the stock LSJ upper radiator hose. The chrome thing is a POS to put it lightly. I want this to be reliable and not just rigged up "so it works". If that means waiting an extra day or two for parts then that's what I will do. Also getting the IAT sensor on the S/C.

Some other issues came up, but Fred @ SMG can better explain than I can since he is doing the work. He did mention that it would extremely nice to have an LSJ throttle body rather than the LE5 throttle body. But either one would work. LSJ is better.




Stock bolts won't work. If you ordered the correct stainless steel ones in the instructions you shouldbe all set. Just torque them correctly in the right order and you will be ok.
gotcha, why did you decide to dump the 2-bar? how do you plan on wiring up the sensors without the harnesses? because to get the harnesses i believe they're all interconnected with the rest of the engine wiring.
Old 09-23-2007, 01:49 PM
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It's all under control. I'll get back to you
Old 09-23-2007, 04:57 PM
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Originally Posted by pjk91
It's all under control. I'll get back to you
lol i like your answer lol its what i would have said.

good luck guys, hopefully by the time you guys get it all set up and fine tuned i'll be on my smaller pulley
Old 09-23-2007, 05:51 PM
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Is there any reason why you didn't use the LSJ map sensor?
Old 09-23-2007, 06:11 PM
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touche sorry for asking so many questions haha i just want this install to be smoothe. p.s. do you have a part number for the stock LSJ radiator hose?
Old 09-23-2007, 06:38 PM
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The upper radiator hose? I don't have the number handy. Fred is going to order it tomorrow for me. Did you buy that chrome hose from CA? It's a piece of junk. Anyways, I saw it on summit for $20 less. You're better off selling it in the classifieds.
Old 09-23-2007, 06:52 PM
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pjk91 i'm reppin you for all the help bro and the updates keep them commin
Old 09-23-2007, 07:01 PM
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Originally Posted by pjk91
Is there any reason why you didn't use the LSJ map sensor?
the lsj has 2 map sensors if i do remember correctly, one is connected to the sc inlet 1 bar i think and the other is on the manifold 2.5 bar and also has the iat2 on it.

i dont plan on boosting more than 16lbs so i dont need a 2.5bar sensor, plus wiring in the iat2's would get a bit confusing as i dont have the schematic for that sensor nor could i find it on the internet
Old 09-23-2007, 07:11 PM
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Originally Posted by pjk91
The upper radiator hose? I don't have the number handy. Fred is going to order it tomorrow for me. Did you buy that chrome hose from CA? It's a piece of junk. Anyways, I saw it on summit for $20 less. You're better off selling it in the classifieds.
yeah honestly i bought it and i was walking through autozone and i think i saw the same one for dirt cheap lol.
Old 09-23-2007, 07:12 PM
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I know the lsj has the temp sensor, and it has a different pigtail but that's ok because you can get that separately from the dealer too. That's what we are going to do then. Use the LSJ map sensor with the temp sensor built in, buy the pigtail and wire it in.

The car is all ready to go. Belt is on, coolant is in. All we need is the map sensor.
Old 09-23-2007, 07:24 PM
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Originally Posted by senior_brown
the lsj has 2 map sensors if i do remember correctly, one is connected to the sc inlet 1 bar i think and the other is on the manifold 2.5 bar and also has the iat2 on it.

i dont plan on boosting more than 16lbs so i dont need a 2.5bar sensor, plus wiring in the iat2's would get a bit confusing as i dont have the schematic for that sensor nor could i find it on the internet
i have all of the sensors in the supercharger/intake manifold already but honestly i cant see any way of getting them to wire up w/o a harness of some sort.

Originally Posted by pjk91
I know the lsj has the temp sensor, and it has a different pigtail but that's ok because you can get that separately from the dealer too. That's what we are going to do then. Use the LSJ map sensor with the temp sensor built in, buy the pigtail and wire it in.

The car is all ready to go. Belt is on, coolant is in. All we need is the map sensor.
is the lsj map sensor with the temp the one on the manifold or supercharger?

Last edited by Beck; 09-23-2007 at 07:24 PM. Reason: Automerged Doublepost
Old 09-23-2007, 07:29 PM
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the 2.5 bar with iat2 is on the manifold
Old 09-23-2007, 08:15 PM
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will the Ion redline recaro seats fit the cobalt 2.4 ss???
Old 09-23-2007, 08:35 PM
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Originally Posted by Jimmys2007CobaltSS/C
will the Ion redline recaro seats fit the cobalt 2.4 ss???
LOL where did this question come from?
Old 09-23-2007, 08:41 PM
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Originally Posted by REDFOCZ
LOL where did this question come from?

my guess... he wants to fool people even more that he's a ss/sc.... then again... i'll call you a ricer if you do that... faking the G85 package ... tsk tsk just kidding man...
Old 09-23-2007, 10:23 PM
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great work guys! just start saving for a new clutch though, as seniorbrown knows
Old 09-24-2007, 01:50 AM
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hehe my clutch should be here tomorow
Old 09-24-2007, 02:23 AM
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this is all just so beautiful haha


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